# CVE-2025-6999

## Summary

- **CVE ID:** CVE-2025-6999
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-444, CWE-444
- **Published:** Sep 15, 2025
- **Last Modified:** Aug 10, 2026

## Description

An HTTP Request Smuggling [CWE-444] vulnerability in the Authentication portal of WatchGuard Fireware OS allows a remote attacker to evade request parameter sanitation and perform a reflected self-Cross-Site Scripting (XSS) attack.This issue affects Fireware OS: from 12.0 through 12.11.2.

## Affected Products

- WatchGuard — Fireware OS (12.0)

## References

- [CNA](https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00014)
- [CNA](https://psirt.watchguard.com/CVE-2025-6999)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 37.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._